WorldArrow icon
Arrow iconUlster

Air quality in Ulster

Air quality index (AQI⁺) and PM2.5 air pollution in Ulster • 17:27, Oct 27

Environmental Protection Agency (EPA) of IrelandIreland Air Quality e-Reporting monitoring network for compliance and informative reporting
Environmental Protection Agency (EPA) of IrelandIreland Air Quality e-Reporting monitoring network for compliance and informative reporting

Live most polluted city ranking

Real-time Ulster most polluted city ranking

#CitiesAQI⁺ US
1
The national flag of Ireland

Letterkenny

66

2
The national flag of Ireland

Buncrana

55

3
The national flag of Ireland

Carndonagh

54

4
The national flag of Ireland

Cavan

49

5
The national flag of Ireland

Monaghan

49

Live cleanest city ranking

Real-time Ulster cleanest city ranking

#CitiesAQI⁺ US
1
The national flag of Ireland

Cavan

49

2
The national flag of Ireland

Monaghan

49

3
The national flag of Ireland

Carndonagh

54

4
The national flag of Ireland

Buncrana

55

5
The national flag of Ireland

Letterkenny

66

Wildfires in Ulster

Real-time information

Active fires

--

external link icon

October 27, 2026: Bishkek among top 10 most polluted cities in the world

external link icon

Which air filter rating should you trust?

Children entering school with air pollution outside
external link icon

Why clean air matters for every child

Which is the most polluted city in Ulster?